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3 years ago

7

How many social security numbers are available if the only restriction is that the number 000-00-0000 cannot be assigned?

1 answer:

harkovskaia [24]3 years ago

3 0

Each digit can be 0-9 ( 10 numbers)
there are 9 numbers in a social security number

multiply 10 nine times:
10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 1,000,000,000 ( 1 billion) possibilities.

the restriction is it can't be all zeros so subtract 1 from the total
1,000,000,000 - 1 = 999,999,999 combinations

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